Re: Solve fails with this simple inequality problem
- To: mathgroup at smc.vnet.net
- Subject: [mg115748] Re: Solve fails with this simple inequality problem
- From: Bob Hanlon <hanlonr at cox.net>
- Date: Thu, 20 Jan 2011 06:26:14 -0500 (EST)
Reduce[Meter == Floor[a*Sqrt[19] + 7] &&
Meter < 6 && (a == -1 || a == 1), {a, Meter}]
a == -1 && Meter == 2
Bob Hanlon
---- michael partensky <partensky at gmail.com> wrote:
=============
Ken, Sqrt returns by definition the *positive* root.
Your question would have been legit (with its syntax properly fixed) for
the negative root, but this must be handled by adding minus (-Sqrt[19])
explicitly.
Can anyone help to reformulate the problem to handle both signs elegantly?
Thanks
Michael Partenskii
On Sun, Jan 16, 2011 at 5:55 AM, KenR <ramsey2879 at msn.com> wrote:
> Solve[Meter = Floor[Sqrt[19]+7] && Meter < 6, Meter] gives a null "{}"
> Any workarounds?
>
>
--
Bob Hanlon